Question

PLEASE HELP !!!

Answer 1

Answer:

A. 10 seconds

Step-by-step explanation:

h(t) = -4.9t² + h

Plug in 500 for initial height:

h(t) = -4.9t² + 500

Height needs to be zero when the ball hits the ground:

0 = -4.9t² + 500

Solve for t:

-4.9t² + 500 = 0

-4.9t² = -500

t² = 102.041

t = 10.102, -10.102

Because time can't be negative, the ball will hit the ground after about 10 seconds

Answer 2

The answer to this question is A